Cheesy Au Gratin Potatoes

Au Gratin Potatoes are the kind of comforting side dish that can make any dinner feel a little more special. Thinly sliced potatoes are layered with a rich, creamy sauce, garlic, and plenty of melted cheese, then baked until tender and beautifully golden on top. The combination of creamy potatoes, savory cheese, and a lightly crisped top is simply irresistible.

I love making this recipe for family dinners, holidays, or whenever I’m craving something warm and cozy. It’s easy to prepare with simple ingredients, yet the finished dish feels wonderfully indulgent. Serve it alongside roasted chicken, steak, or vegetables, and you’ll have a hearty side that everyone will want a second helping of.

Au Gratin Potatoes Ingredients

• 1 tablespoon chopped fresh parsley, for garnish
• 3 pounds Yukon Gold or russet potatoes, thinly sliced
• 3 tablespoons unsalted butter
• 2 cloves garlic, finely minced
• 3 tablespoons all-purpose flour
• 2 cups whole milk
• 1 cup heavy cream
• 1 ½ cups shredded Gruyère cheese
• ½ cup shredded sharp cheddar cheese
• ½ cup grated Parmesan cheese
• 1 teaspoon salt
• ½ teaspoon black pepper
• ¼ teaspoon paprika
• ¼ teaspoon ground nutmeg
• 1 small onion, thinly sliced

How to Make Au Gratin Potatoes

Step 1: Prepare the Potatoes and Creamy Sauce

Wash, peel, and thinly slice the potatoes into even rounds. Melt the butter in a saucepan, then add the garlic and cook briefly. Whisk in the flour, followed slowly by the milk and heavy cream. Add the salt, black pepper, paprika, and nutmeg, then stir until the sauce becomes creamy and slightly thick. Remove from the heat and mix in the Gruyère and cheddar cheese until melted and smooth.

Step 2: Layer the Potatoes

Grease a 9 x 13-inch baking dish with butter. Arrange a layer of sliced potatoes in the bottom, followed by a little sliced onion and some of the creamy cheese sauce. Continue making layers until all the potatoes are used, making sure the sauce is spread evenly between the layers. Finish with the remaining sauce and sprinkle Parmesan cheese over the top.

Step 3: Bake the Potatoes

Cover the baking dish tightly with aluminum foil and bake in a preheated 400°F (200°C) oven for about 45 minutes. Remove the foil and continue baking for another 20–30 minutes, or until the potatoes are soft when tested with a knife and the cheese on top is golden and bubbling.

Step 4: Rest and Serve

Remove the Au Gratin Potatoes from the oven and let them rest for 10–15 minutes before serving. This allows the creamy sauce to settle and thicken slightly. Garnish with fresh parsley or chives if desired, then serve warm with your favorite main dish.

Why You’ll Love This Recipe

• Creamy and Cheesy – Every bite is rich, creamy, and full of melted cheese.
• Easy to Make – The ingredients are simple, and the steps are easy to follow.
• Perfect Comfort Food – Warm potatoes and creamy sauce make this dish cozy and satisfying.
• Great for Family Dinners – It is a side dish that both kids and adults can enjoy.

Tips and Shortcuts

• Do not boil the cheese sauce – Keep the heat low after adding the cheese to help prevent the sauce from becoming oily.
• Cover while baking – Keep the dish covered during the first part of baking so the potatoes cook without the top becoming too dark.
• Let it rest – Allow the potatoes to rest for 10–15 minutes after baking so the sauce can thicken.
• Add extra flavor – Try adding garlic, sliced onions, thyme, chives, or cooked bacon for a tasty twist.

What to Serve with Au Gratin Potatoes

These au gratin potatoes are creamy, cheesy, and wonderfully comforting. They make a delicious side for roasted chicken, baked ham, or grilled steak, and pair nicely with a crisp salad and juice, or lemonade.

Frequently Asked Questions

Can I add onions to this recipe ?

Yes. Thinly sliced onions add a slightly sweet flavor and taste wonderful with the creamy potatoes.

Can I add garlic ?

Absolutely. Garlic adds extra flavor to the cheese sauce. Fresh minced garlic works especially well.

Can I add bacon ?

Yes. Cook the bacon until crispy, crumble it, and add it between the potato layers for a smoky and savory flavor.

Can I use cheddar cheese ?

Yes. Cheddar works very well and gives the potatoes a delicious, stronger cheese flavor.

How to Store Leftovers

Refrigerator Storage

Let the potatoes cool, then cover them tightly or place them in an airtight container. Refrigerate for 3–4 days. Reheat in the microwave or in a 350°F (175°C) oven until warm.

Freezer Storage

Cool completely, then place in a freezer-safe container and freeze for up to 2–3 months. Thaw overnight in the refrigerator and reheat in a 350°F (175°C) oven until hot.

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